[anonymouzz]

Afaik it's a custom system with download-and-cache-on-demand.

Note that there's nothing forbidding you from writing a virtual git filesystem that fetches objects from some centralized repo as files are open()ed. Git on cloud steroids.

[chokolad]

Microsoft actually had done it and pushed the whole Windows repo into git.

https://github.com/Microsoft/VFSForGit